2. Cut a 1/4-inch-thick slice from each end of grapefruit using a sharp, thin-bladed knife. Place, flat ends down, on a cutting board, and remove peel in strips, cutting from top to bottom following the curvature of fruit. Remove any remaining bitter white pith. Holding peeled grapefruit over a bowl, slice between membranes, and gently remove whole segments. Reserve 1/4 cup juice.